
\begin{table}[htb]
\caption{Robustness check: All interactions}
\begin{center}
\begin{tabular}{l c c c}
\hline
 & Experiment 1 & Experiment 2 & Experiment 3 \\
\hline
Citizens                                         & $4.89^{*}$        & $5.25^{*}$        & $-1.98^{*}$       \\
                                                 & $ [ 4.01;  5.78]$ & $ [ 4.23;  6.20]$ & $ [-3.33; -0.60]$ \\
Benefits                                         &                   &                   & $4.38^{*}$        \\
                                                 &                   &                   & $ [ 2.91;  5.82]$ \\
Citizens $\times$ Benefits                       &                   &                   & $2.82^{*}$        \\
                                                 &                   &                   & $ [ 0.89;  4.65]$ \\
Citizens $\times$ L-R Ideology                   & $-0.59^{*}$       & $-0.52^{*}$       & $0.28$            \\
                                                 & $ [-0.83; -0.35]$ & $ [-0.76; -0.24]$ & $ [-0.12;  0.68]$ \\
Benefits $\times$ L-R Ideology                   &                   &                   & $-0.02$           \\
                                                 &                   &                   & $ [-0.38;  0.34]$ \\
Citizens $\times$ Benefits $\times$ L-R Ideology &                   &                   & $-0.42$           \\
                                                 &                   &                   & $ [-0.90;  0.04]$ \\
Citizens $\times$ Role Perc.                     & $-1.20^{*}$       & $-1.69^{*}$       & $-0.55$           \\
                                                 & $ [-2.12; -0.29]$ & $ [-2.61; -0.78]$ & $ [-1.92;  0.83]$ \\
Citizens $\times$ Role Perc.                     & $-2.67^{*}$       & $-1.38^{*}$       & $0.33$            \\
                                                 & $ [-3.60; -1.79]$ & $ [-2.26; -0.44]$ & $ [-1.16;  1.71]$ \\
Benefits $\times$ Role Perc.                     &                   &                   & $-0.12$           \\
                                                 &                   &                   & $ [-1.53;  1.21]$ \\
Benefits $\times$ Role Perc.                     &                   &                   & $0.10$            \\
                                                 &                   &                   & $ [-1.21;  1.39]$ \\
Citizens $\times$ Benefits $\times$ Role Perc.   &                   &                   & $-0.09$           \\
                                                 &                   &                   & $ [-1.75;  1.68]$ \\
Citizens $\times$ Benefits $\times$ Role Perc.   &                   &                   & $-0.87$           \\
                                                 &                   &                   & $ [-2.65;  0.95]$ \\
Age                                              & $-0.01$           & $-0.03^{*}$       & $-0.01$           \\
                                                 & $ [-0.02;  0.00]$ & $ [-0.04; -0.01]$ & $ [-0.02;  0.00]$ \\
Male legislator                                  & $0.13$            & $0.46^{*}$        & $0.14$            \\
                                                 & $ [-0.21;  0.45]$ & $ [ 0.15;  0.79]$ & $ [-0.16;  0.44]$ \\
Left-right ideology                              & $0.53^{*}$        & $0.52^{*}$        & $0.27$            \\
                                                 & $ [ 0.36;  0.71]$ & $ [ 0.34;  0.70]$ & $ [-0.07;  0.61]$ \\
Trustee vs. delegate                             & $0.33$            & $0.44^{*}$        & $0.61^{*}$        \\
                                                 & $ [-0.01;  0.67]$ & $ [ 0.08;  0.82]$ & $ [ 0.26;  0.98]$ \\
Single member districts                          & $0.40$            & $0.44$            & $-0.16$           \\
                                                 & $ [-0.07;  0.86]$ & $ [-0.01;  0.91]$ & $ [-0.59;  0.23]$ \\
Upper chamber                                    & $-0.33$           & $-0.18$           & $-0.13$           \\
                                                 & $ [-0.72;  0.07]$ & $ [-0.57;  0.23]$ & $ [-0.52;  0.24]$ \\
First term legislator                            & $-0.04$           & $-0.12$           & $0.14$            \\
                                                 & $ [-0.37;  0.31]$ & $ [-0.47;  0.26]$ & $ [-0.16;  0.47]$ \\
Intercept                                        & $2.73^{*}$        & $2.46^{*}$        & $3.10^{*}$        \\
                                                 & $ [ 1.51;  3.89]$ & $ [ 1.38;  3.55]$ & $ [ 1.48;  4.52]$ \\
\hline
N                                                & $789$             & $789$             & $789$             \\
\hline
\multicolumn{4}{l}{\scriptsize{\parbox{0.9\linewidth}{$^*$ Null hypothesis value outside the 95\% confidence interval. Entries are unstandardized coefficients from a linear mixed-effect regression model. Bootstrapped confidence intervals in parentheses. Countries function as groups. Support for PTAs is captured on an 11-point scale.}}}
\end{tabular}
\label{tab:tableI2}
\end{center}
\end{table}
